From e2e62b3808691e15fa44b883270023e42dcad958 Mon Sep 17 00:00:00 2001
From: Erlend Egeberg Aasland <erlend.aasland@innova.no>
Date: Fri, 29 Oct 2021 22:21:58 +0200
Subject: [PATCH] bpo-45581: Raise `MemoryError` in `sqlite3.connect` if SQLite
 signals memory error (GH-29171)

---
 .../next/Library/2021-10-22-21-57-02.bpo-45581.rlH6ay.rst     | 2 ++
 Modules/_sqlite/connection.c                                  | 4 ++++
 2 files changed, 6 insertions(+)
 create mode 100644 Misc/NEWS.d/next/Library/2021-10-22-21-57-02.bpo-45581.rlH6ay.rst

diff --git a/Misc/NEWS.d/next/Library/2021-10-22-21-57-02.bpo-45581.rlH6ay.rst b/Misc/NEWS.d/next/Library/2021-10-22-21-57-02.bpo-45581.rlH6ay.rst
new file mode 100644
index 00000000000..13a3b237434
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2021-10-22-21-57-02.bpo-45581.rlH6ay.rst
@@ -0,0 +1,2 @@
+:meth:`sqlite3.connect` now correctly raises :exc:`MemoryError` if the
+underlying SQLite API signals memory error. Patch by Erlend E. Aasland.
diff --git a/Modules/_sqlite/connection.c b/Modules/_sqlite/connection.c
index da2f12e8f99..94c38ad3954 100644
--- a/Modules/_sqlite/connection.c
+++ b/Modules/_sqlite/connection.c
@@ -165,6 +165,10 @@ pysqlite_connection_init_impl(pysqlite_Connection *self,
                          (uri ? SQLITE_OPEN_URI : 0), NULL);
     Py_END_ALLOW_THREADS
 
+    if (self->db == NULL && rc == SQLITE_NOMEM) {
+        PyErr_NoMemory();
+        return -1;
+    }
     if (rc != SQLITE_OK) {
         _pysqlite_seterror(state, self->db);
         return -1;